Establish the formular σ_(x−y) ^2 =σ_x ^2 +σ_y ^2 −2rσ_x σ_y where by r is the correlation coefficient between x and y


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Question Number 192254 by Spillover last updated on 13/May/23

$E s t a b l i s h t h e f o r m u l a r$ $σ_{x - y}^{2} = σ_{x}^{2} + σ_{y}^{2} - 2 r σ_{x} σ_{y}$ $w h e r e b y r i s t h e c o r r e l a t i o n$ $c o e f f i c i e n t b e t w e e n x a n d y$
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